/// <summary>
/// Saves a shortened version the specified sample as a mono wave in the Scratch folder and launches Scratch
/// </summary>
/// <param name="sample">The sample.</param>
public static void LaunchShort(Sample sample)
{
if (_applicationFolder == "")
{
return;
}
SilenceHelper.GenerateSilenceAudioFile(GetSilenceFilename());
SaveSample(sample);
var bpm = BpmHelper.GetBpmFromLoopLength(sample.LengthSeconds);
var loopLength = BpmHelper.GetDefaultLoopLength(bpm);
var shortLength = loopLength / 8;
if (shortLength > sample.LengthSeconds)
{
shortLength = sample.LengthSeconds;
}
var gain = GetGain(sample.Filename);
var scratchFilePath = Path.Combine(_applicationFolder, ScratchFile);
AudioExportHelper.SaveAsMonoWave(sample.Filename, scratchFilePath, shortLength, gain);
var scratchExePath = Path.Combine(_applicationFolder, ScratchExe);
Process.Start(scratchExePath);
}
/// <summary>
/// Saves the partial as wave.
/// </summary>
/// <param name="inFilename">The in filename.</param>
/// <param name="outFilename">The out filename.</param>
/// <param name="start">The start position in seconds.</param>
/// <param name="length">The length in seconds.</param>
/// <param name="offset">The offset position in seconds.</param>
/// <param name="gain">The gain.</param>
/// <param name="bpm">The BPM.</param>
/// <param name="targetBpm">The target BPM.</param>
public static void SavePartialAsWave(string inFilename,
string outFilename,
double start,
double length,
double offset = 0,
float gain = 0,
decimal bpm = 0,
decimal targetBpm = 0)
{
// DebugHelper.WriteLine("Saving portion of track as wave with offset - " + inFilename);
var audioStream = new Sample
{
Filename = inFilename,
Description = inFilename,
Gain = gain,
Bpm = bpm
};
AudioStreamHelper.LoadAudio(audioStream);
if (targetBpm != 0)
{
if (bpm == 0)
{
bpm = BpmHelper.GetBpmFromLoopLength(length);
}
var percentChange = BpmHelper.GetAdjustedBpmPercentChange(bpm, targetBpm) / 100;
AudioStreamHelper.SetTempoToMatchBpm(audioStream.ChannelId, bpm, targetBpm);
length = length * (double)(1 + percentChange);
}
const BASSEncode flags = BASSEncode.BASS_ENCODE_PCM;
BassEnc.BASS_Encode_Start(audioStream.ChannelId, outFilename, flags, null, IntPtr.Zero);
var startByte = Bass.BASS_ChannelSeconds2Bytes(audioStream.ChannelId, start);
var endByte = Bass.BASS_ChannelSeconds2Bytes(audioStream.ChannelId, start + length);
if (offset == 0 || offset == start)
{
TransferBytes(audioStream.ChannelId, startByte, endByte);
}
else
{
startByte = Bass.BASS_ChannelSeconds2Bytes(audioStream.ChannelId, offset);
TransferBytes(audioStream.ChannelId, startByte, endByte);
startByte = Bass.BASS_ChannelSeconds2Bytes(audioStream.ChannelId, start);
endByte = Bass.BASS_ChannelSeconds2Bytes(audioStream.ChannelId, offset);
TransferBytes(audioStream.ChannelId, startByte, endByte);
}
BassEnc.BASS_Encode_Stop(audioStream.ChannelId);
Bass.BASS_StreamFree(audioStream.ChannelId);
AudioStreamHelper.UnloadAudio(audioStream);
}
